Patent US4326544A successfully refreshed from Google Patents.
US4326544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Smoking product
Assignee: Gallaher Ltd
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Filing: 1980-05-08
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Granted: 1982-04-27
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Expires: 2000-05-08
Abstract
Abstract Cigarettes are formed by subjecting a three dimensional needled felt web of viscose fibres to a controlled pyrolysis, loading the felt web with smoking and combustion agents, cutting the felt web into strips and wrapping individual strips in a tubular wrapper.
Inventors
- 👤 Michael J. Hardwick
- 👤 Kenneth R. McMeekan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:26
CPC Classifications
A; A24; A24B; A24B15/00; A24B15/10; A24B15/16; A24B15/165
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
107 words
A method of making a tobacco substitute fuel smoking rod, said method comprising preparing viscose fibers in the form of a felt web in which the fibers have a three dimensional lay, a bulk density of between 5 and 80 kg/cu. m., and an areal density of between 0.15 and 1.0 kg/sq. m., subjecting said felt web to controlled pyrolysis until the organic residue contains at least 90% carbon by weight, loading the felt web with combustion modifying agents and volatile ingredients for smoking, dividing the felt web into strip pieces for smoking, and wrapping individual strip pieces in a tubular wrapper to form said smoking rods.
Claim 2
Independent Claim
107 words
A method of making a tobacco substitute fuel smoking rod, said method comprising preparing viscose fibers in the form of a felt web in which the fibers have a three dimensional lay, a bulk density of between 5 and 80 kg/cu. m., and an areal density of between 0.15 and 1.0 kg/sq. m., subjecting said felt web to controlled pyrolysis until the organic residue contains at least 90% carbon by weight, loading the felt web with combustion modifying agents and volatile ingredients for smoking, dividing the felt web into strip pieces for smoking, and wrapping individual strip pieces in a tubular wrapper to form said smoking rods.
Claim 3
Dependent Claim
16 words
A method according to claim 1, in which the three dimensional lay is produced by needling.
Claim 4
Dependent Claim
25 words
A method according to claim 1 or claim 2, in which the fibres are staple fibres having a length of between 20 and 100 mm.
Claim 5
Dependent Claim
18 words
A method according to claim 1, in which the fibres have a denier of between 5 and 20.
Claim 6
Dependent Claim
12 words
A method according to claim 1, in which the fibres are crimped.
Claim 7
Dependent Claim
17 words
A method according to claim 1, in which the bulk density is between 25 and 40 kg./cu.m.
Claim 8
Dependent Claim
17 words
A method according to claim 1, in which the areal density is between 0.2 and 0.6 kg./sq.m.
Claim 9
Independent Claim
32 words
A method according to any one of the preceding claims, in which the felt web is loaded with combustion modifying agents and volatile ingredients for smoking and divided into pieces for smoking.
Claim 10
Dependent Claim
13 words
A product which has been made by a method according to claim 1.
Claim 11
Dependent Claim
20 words
Method of claim 1, wherein the felt web is cut into strips of between 0.3 and 10 cm. in width.
Claim 12
Dependent Claim
15 words
Method of claim 10, wherein the strips are between 0.3 and 5 cm. in width.
References Cited (Backward Citations)
US4044777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-26 | 1985-10-26 | 1986-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-26 | 1989-10-26 | 1990-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-26 | 1993-10-26 | 1994-04-27 | $7700.00 | Window Closed / Lapsed |